getWaitFactor

The wait factor, when multiplied by the estimated amount of time we expect to have to wait for incoming data that's
already on its way, is how long we will actually wait for that data before initiating a new query. A value of zero
means never wait, i.e., always start a new query immediately; a value of 1.0 would mean to wait up to the estimated
amount of time; a very high value would mean wait until the outstanding query either produces the data or completes.